2.3 hydroxynaphthyl-arylketones



Patented Aug. 11, 1931 UNITED STATES ARTHUR ZITSCHER, or OFIEENBACH-ON-THE-MAIN, GERMANY, Assrel'xioitro GENERAL ANILINE WORKS, INC, or NEW YORK, N. Y., A coRroRArrIoNor DELAWARE 2.3 HYDROXYNAPHTHYL-ARYLKETONES No Drawing". Application filed December 16, 1927, Serial No. 240,635, and in Germany January 3,1927.

The present invention relates to new 2.3 hydroxynaphthyl-arylketones.

I have found that ortho hydroxydiarylketones are obtained by treating ortho hy droxyaryl carboxylic acid halides with aromatic hydrocarbons or substitution proclucts thereof in presence of acid condensing agents, preferably of aluminium chloride. It is a surprising fact that such a condensation takes place without the formation of by products and the homogeneous products are obtained in a good yield. The ortho hydroxydiarylketones thus obtained may be used as intermediates for the production of dyestuffs.

Among the new compounds obtainable according to my process especially ortho hydroxydiarylketones may be named, corresponding probably to the formula wiigx wherein X means an alkylor alkyloxy group.

In order to further illustrate my invention the following examples are given, the parts being by weight and all temperatures in Centigrade degrees, but it is understood that.

my invention is not limited to the particular products or reacting conditions mentioned therein.

E wample 1 The 2.3-hydroxynaphthophenone corresponding to the formula:

. E wample 2 is obtained. It crystallizes from dilute alcohol or ligroine as yellow compact needles meltlng at l52l53 (uncorrected).

Example 3 105 parts of 2.3-hydroxynaphthoyl chloride, 60 parts anisole in 500 parts of carbon disulfide and 110 parts of aluminium chloride yield, when heated at 45 for about 3 hours, the new 2.3-hydroxynaphthyl-anisylketone probably of the following formula:

on o o-O-oom It represents, when crystallized from ligroine, yellow brilliant lamellas melting at l3l134, 5 (uncorrected).

I claim: 1. As new compounds 2.3-hydroxynaphthyl-arylketones of the general formula:

wherein, X means an alkyl or alkyloxy group, which compounds are yellow crystalline substances.

2. As new compounds 2.3-hydroxy-nephthyl-arylketones of the general formula:

wherein X means a methyl or methoxy group, which compounds are yellow crystalline substances;

@In testimony whereof, I afiix my signature.

ARTHUR ZITSCHER. 

